Model: KFN556-5

Extended Washer Self-locking Nut

Properties:

Thread Class

Thread Direction

Right-hand

Locking Feature

Prevailing torque all metal design

Washer Outside Diameter

0.636 inches

Lubrication

Soluble lubricant

Overall Height

0.465 inches

Nut Style

Hexagon

Washer Thickness

Between 0.117 inches and 0.127 inches

Width Across Flats

Between 0.367 inches and 0.376 inches

Thread Series

Unjf

Thready Qty Per Inch (tpi)

Hardness Rating

Between 39.0 rockwell c and 43.0 rockwell c

Thread Size

0.312 inches

Material

Plastic polytetrafluoroethylene seal

Material

Steel comp 8740 nut or steel comp e4340 nut

Material Specification

Mil-p-19468 military specification single material response seal

Material Specification

Mil-s-6049 military specification 1st material response nut or mil-s-5000 military specification 2nd material response nut

Surface Treatment

Cadmium nut and chromate nut

Surface Treatment Specification

Qq-p-416, ty2, cl2 federal specification single treatment response nut

NSN

5310-01-387-0391

Part Number

KFN556-5

Description

Nut,self-locking,extended Washer

CAGE

15653

A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery. An integral feature is incorporated for locking on the threads of a mating member.

Part KFN556-5 NSN 5310-01-387-0391

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

29730

FIIG:

A021A0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

0.1000lbs

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

WCC:

576

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7318160000
SITC: 69421
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Nuts of iron or steel